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When using any
optional fields on a
request method, the request message must be constructed outside of the
method and passed in as a single parameter.
Optional request headers, for example the
validate_only header in
the GoogleAdsService.Search method,
are not present in the method signature as keyword parameters, so they must be
set on the request message directly.
To determine if a request object field is required or optional, you can
reference the protobuf definitions for
services
and look for fields that contain the annotation [(google.api.field_behavior) =
REQUIRED].
Here's an example that sets the optional validate_only field
on a GoogleAdsService.Search request:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-17 UTC."],[[["When using optional fields in Google Ads API requests, construct the request message separately and pass it as a single parameter to the method."],["Optional request headers like `validate_only` are set directly on the request message, not as keyword parameters in the method signature."],["You can identify required or optional request fields by checking the protobuf definitions and looking for the `[(google.api.field_behavior) = REQUIRED]` annotation."],["To use optional fields, create an instance of the request message type, populate its fields including the optional ones, and then pass it to the API method."]]],[]]
